Nuclear fusion is a reaction in which two or more atomic nuclei combine to form a larger nuclei, nuclei/ neutron by-products. The difference in mass between the reactants and products is manifested as either the release or absorption of energy.

For potential nuclear energy sources for the Earth, the deuterium-tritium fusion reaction contained by some kind of magnetic confinement seems the most likely path. However, for the fueling of the stars, other fusion reactions will dominate.

In practice, the colliding particles move with a distribution of relative velocities, f(v) f (v) (and hence collision energies); a useful quantity is the averaged reactivity: σv = ∫∞ 0 σ(v)vf(v)dv. σ v = ∫ 0 ∞ σ (v) v f (v) d v. For the Maxwell distribution of the relative speeds of the colliding particles,

The DT reaction is the most promising fusion reaction because it requires the smallest input energy (~ 10KeV) or lowest temperature (~ 10 8 degrees), and yields one of the largest output energy (17.6 MeV). The energy gain for this type of reaction is around 2,000.

The two nuclear reactions now most commonly used for power production purposes are designated as DD and D-T reactions. The former stands for deuterium-deuterium and involves the combination of two deuterium nuclei to form a helium-3 nucleus and a free neutron.

Fusion reactions primarily consist of deuteron-deuteron (DD), deuteron-triton (DT) and deuteron-he- lion (D 3 He) reactions where the 3 He, or helium-3, is known as a helion. The primary DD reaction produces

3. The catalyzed DD reaction. The four reactions D-D-n, D-D-p, D_3 He and D-T are used. The 3 He and produced by the primary DD reactions are reinjected into the plasma until they react with the deu-terium. Approximately 61.8% of the fusion energy becomes charged particle energy, the rest becomes neutron energy.

2023年5月9日 · In this work, the feasibility of nuclear processes is studied via classical thermodynamics by assessing the change in entropy, a parameter that has so far been neglected in the analysis of these reactions. The contribution of the entropy to the reaction spontaneity plays a different role in the fission and fusion reactions.

2024年8月14日 · Following the first theoretical and experimental indications for the existence of the deuteron-deuteron threshold resonance in the 4 He nucleus and its dominant decay by the internal e+e− pair creation, we present here an extensive experimental study confirming emission of high-energy electrons and positrons.

The DD reactions in a DT-oriented fusion reactor with external power injection by neutral beams produce tritium and neutrons. Tritium produced by the DD reaction together with that produced in the blanket by the 2.45 MeV neutron is re-circulated into the plasma. Then, the DT reaction rate increases gradually, as tritium concentration